1. Sanders‐Brown Center on Aging University of Kentucky Lexington Kentucky USA
2. Department of Neuroscience University of Kentucky Lexington Kentucky USA
3. Spinal Cord and Brain Injury Research Center University of Kentucky Lexington Kentucky USA
4. Department of Physical Medicine & Rehabilitation University of Kentucky Lexington Kentucky USA
5. Bluegrass Research Consultants, Inc. Versailles Kentucky USA
6. Department of Neurology Duke University Durham North Carolina USA
7. Duke Clinical Research Institute Durham North Carolina USA
8. Duke Early Phase Clinical Research Unit Durham North Carolina USA
9. Department of Pharmacology Northwestern University Chicago Illinois USA